Bird Model 43 Wattmeter
40
Bird 4431 Thruline Wattmeter
The Bird 4431 RF Sampling Wattmeter is the same as the Bird 43
Thruline Wattmeter except for an RF signal sampler probe.
The RF sampler provides a low power sample of the signal being
transmitted through the wattmeter’s linesection. This signal is avail-
able at the female BNC connector labeled “RF SAMPLE”, on the right
side of the housing. The signal level can be set with the control knob
on the front of the meter. The table below lists approximate attenua-
tion levels, and notes maximum suggested adjustment. The sampler
output may be fed to any suitable RF signal monitoring device; e.g. a
frequency counter, spectrum analyzer, or oscilloscope. All other opera-
tion instructions are the same as for the Bird 43.
Sampler at max
(Fully clockwise)
Turned counter-
clockwise 4 full
turns from max
*
Turned counter-
clockwise 7 full
turns from max
*
Freq.
(MHz)
Atten.
(dB)
Freq.
(MHz)
Atten.
(dB)
Freq.
(MHz)
Atten.
(dB)
2
69
300
38
800
36
10
57
400
34
900
35.5
25
46
500
30
1000
35
50
42
600
29.5
75
39
700
29
*
Approximate
attenuation
100
36
800
28.5
200
31
900
28
Содержание Thruline 43
Страница 2: ...THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 14: ......
Страница 17: ...Bird Model 43 Wattmeter 3 Figure 2 Bird 43 Thruline Wattmeter Outline Drawing ...
Страница 18: ...Bird Model 43 Wattmeter 4 ...
Страница 23: ...Bird Model 43 Wattmeter 9 Figure 4 Percent Reflected Power vs VSWR 1 0 1 3 ...
Страница 24: ...Bird Model 43 Wattmeter 10 Figure 5 Percent Reflected Power vs VSWR 1 0 8 0 ...
Страница 30: ...Bird Model 43 Wattmeter 16 ...
Страница 34: ...Bird Model 43 Wattmeter 20 ...
Страница 37: ...Bird Model 43 Wattmeter 23 Figure 9 VSWR Conversion Graph Reflected Power 0 2 20 0 ...
Страница 38: ...Bird Model 43 Wattmeter 24 Figure 10 VSWR Conversion Graph Reflected Power 0 01 1 00 ...
Страница 40: ...Bird Model 43 Wattmeter 26 Figure 11 Cable Length Wavelength Matching ...
